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Date: Sun, 19 Jul 2015 15:04:45 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Cristina Opriceana <cristina.opriceana@...il.com>, knaack.h@....de
CC: lars@...afoo.de, pmeerw@...erw.net, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, daniel.baluta@...el.com,
octavian.purdila@...el.com
Subject: Re: [PATCH v4] tools: iio: Send error messages to stderr
On 17/07/15 16:43, Cristina Opriceana wrote:
> This patch indends to make some cleanup and send printf
> error messages to stderr. The changes were performed with coccinelle
> for failure messages and manual for other cases, such as wrong usage
> messages.
>
> Signed-off-by: Cristina Opriceana <cristina.opriceana@...il.com>
> Reviewed-by: Hartmut Knaack <knaack.h@....de>
Another good cleanup. My only trivial quible. You didn't mention
it was dependent on your previous set. As I tend to work backwards through
my emails (half of them have been solved already by the time I get to them)
I was confused for a while!
Applied to the togreg branch of iio.git
Thanks,
Jonathan
> ---
> Changes since v4:
> - fix indentation issues
>
> tools/iio/generic_buffer.c | 39 ++++++++++++++++++---------------
> tools/iio/iio_event_monitor.c | 14 ++++++------
> tools/iio/iio_utils.c | 51 +++++++++++++++++++++++++------------------
> tools/iio/lsiio.c | 2 +-
> 4 files changed, 59 insertions(+), 47 deletions(-)
>
> diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
> index 9535c2d..32f389eb 100644
> --- a/tools/iio/generic_buffer.c
> +++ b/tools/iio/generic_buffer.c
> @@ -193,15 +193,15 @@ void process_scan(char *data,
>
> void print_usage(void)
> {
> - printf("Usage: generic_buffer [options]...\n"
> - "Capture, convert and output data from IIO device buffer\n"
> - " -c <n> Do n conversions\n"
> - " -e Disable wait for event (new data)\n"
> - " -g Use trigger-less mode\n"
> - " -l <n> Set buffer length to n samples\n"
> - " -n <name> Set device name (mandatory)\n"
> - " -t <name> Set trigger name\n"
> - " -w <n> Set delay between reads in us (event-less mode)\n");
> + fprintf(stderr, "Usage: generic_buffer [options]...\n"
> + "Capture, convert and output data from IIO device buffer\n"
> + " -c <n> Do n conversions\n"
> + " -e Disable wait for event (new data)\n"
> + " -g Use trigger-less mode\n"
> + " -l <n> Set buffer length to n samples\n"
> + " -n <name> Set device name (mandatory)\n"
> + " -t <name> Set trigger name\n"
> + " -w <n> Set delay between reads in us (event-less mode)\n");
> }
>
> int main(int argc, char **argv)
> @@ -271,7 +271,7 @@ int main(int argc, char **argv)
> }
>
> if (!device_name) {
> - printf("Device name not set\n");
> + fprintf(stderr, "Device name not set\n");
> print_usage();
> return -1;
> }
> @@ -279,7 +279,7 @@ int main(int argc, char **argv)
> /* Find the device requested */
> dev_num = find_type_by_name(device_name, "iio:device");
> if (dev_num < 0) {
> - printf("Failed to find the %s\n", device_name);
> + fprintf(stderr, "Failed to find the %s\n", device_name);
> return dev_num;
> }
>
> @@ -307,7 +307,8 @@ int main(int argc, char **argv)
> /* Verify the trigger exists */
> trig_num = find_type_by_name(trigger_name, "trigger");
> if (trig_num < 0) {
> - printf("Failed to find the trigger %s\n", trigger_name);
> + fprintf(stderr, "Failed to find the trigger %s\n",
> + trigger_name);
> ret = trig_num;
> goto error_free_triggername;
> }
> @@ -323,8 +324,8 @@ int main(int argc, char **argv)
> */
> ret = build_channel_array(dev_dir_name, &channels, &num_channels);
> if (ret) {
> - printf("Problem reading scan element information\n");
> - printf("diag %s\n", dev_dir_name);
> + fprintf(stderr, "Problem reading scan element information\n"
> + "diag %s\n", dev_dir_name);
> goto error_free_triggername;
> }
>
> @@ -350,7 +351,8 @@ int main(int argc, char **argv)
> dev_dir_name,
> trigger_name);
> if (ret < 0) {
> - printf("Failed to write current_trigger file\n");
> + fprintf(stderr,
> + "Failed to write current_trigger file\n");
> goto error_free_buf_dir_name;
> }
> }
> @@ -382,7 +384,7 @@ int main(int argc, char **argv)
> fp = open(buffer_access, O_RDONLY | O_NONBLOCK);
> if (fp == -1) { /* TODO: If it isn't there make the node */
> ret = -errno;
> - printf("Failed to open %s\n", buffer_access);
> + fprintf(stderr, "Failed to open %s\n", buffer_access);
> goto error_free_buffer_access;
> }
>
> @@ -410,7 +412,7 @@ int main(int argc, char **argv)
> read_size = read(fp, data, toread * scan_size);
> if (read_size < 0) {
> if (errno == EAGAIN) {
> - printf("nothing available\n");
> + fprintf(stderr, "nothing available\n");
> continue;
> } else {
> break;
> @@ -431,7 +433,8 @@ int main(int argc, char **argv)
> ret = write_sysfs_string("trigger/current_trigger",
> dev_dir_name, "NULL");
> if (ret < 0)
> - printf("Failed to write to %s\n", dev_dir_name);
> + fprintf(stderr, "Failed to write to %s\n",
> + dev_dir_name);
>
> error_close_buffer_access:
> if (close(fp) == -1)
> diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
> index 9ee1959..cd3fd41 100644
> --- a/tools/iio/iio_event_monitor.c
> +++ b/tools/iio/iio_event_monitor.c
> @@ -215,8 +215,8 @@ static void print_event(struct iio_event_data *event)
> bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
>
> if (!event_is_known(event)) {
> - printf("Unknown event: time: %lld, id: %llx\n",
> - event->timestamp, event->id);
> + fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
> + event->timestamp, event->id);
>
> return;
> }
> @@ -251,7 +251,7 @@ int main(int argc, char **argv)
> int fd, event_fd;
>
> if (argc <= 1) {
> - printf("Usage: %s <device_name>\n", argv[0]);
> + fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
> return -1;
> }
>
> @@ -277,14 +277,14 @@ int main(int argc, char **argv)
> fd = open(chrdev_name, 0);
> if (fd == -1) {
> ret = -errno;
> - fprintf(stdout, "Failed to open %s\n", chrdev_name);
> + fprintf(stderr, "Failed to open %s\n", chrdev_name);
> goto error_free_chrdev_name;
> }
>
> ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
> if (ret == -1 || event_fd == -1) {
> ret = -errno;
> - fprintf(stdout, "Failed to retrieve event fd\n");
> + fprintf(stderr, "Failed to retrieve event fd\n");
> if (close(fd) == -1)
> perror("Failed to close character device file");
>
> @@ -300,7 +300,7 @@ int main(int argc, char **argv)
> ret = read(event_fd, &event, sizeof(event));
> if (ret == -1) {
> if (errno == EAGAIN) {
> - printf("nothing available\n");
> + fprintf(stderr, "nothing available\n");
> continue;
> } else {
> ret = -errno;
> @@ -310,7 +310,7 @@ int main(int argc, char **argv)
> }
>
> if (ret != sizeof(event)) {
> - printf("Reading event failed!\n");
> + fprintf(stderr, "Reading event failed!\n");
> ret = -EIO;
> break;
> }
> diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
> index e177f40..c3f9e37 100644
> --- a/tools/iio/iio_utils.c
> +++ b/tools/iio/iio_utils.c
> @@ -140,7 +140,8 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
> sysfsfp = fopen(filename, "r");
> if (!sysfsfp) {
> ret = -errno;
> - printf("failed to open %s\n", filename);
> + fprintf(stderr, "failed to open %s\n",
> + filename);
> goto error_free_filename;
> }
>
> @@ -152,11 +153,13 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
> &padint, shift);
> if (ret < 0) {
> ret = -errno;
> - printf("failed to pass scan type description\n");
> + fprintf(stderr,
> + "failed to pass scan type description\n");
> goto error_close_sysfsfp;
> } else if (ret != 5) {
> ret = -EIO;
> - printf("scan type description didn't match\n");
> + fprintf(stderr,
> + "scan type description didn't match\n");
> goto error_close_sysfsfp;
> }
>
> @@ -170,7 +173,8 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
> *is_signed = (signchar == 's');
> if (fclose(sysfsfp)) {
> ret = -errno;
> - printf("Failed to close %s\n", filename);
> + fprintf(stderr, "Failed to close %s\n",
> + filename);
> goto error_free_filename;
> }
>
> @@ -454,7 +458,8 @@ int build_channel_array(const char *device_dir,
> sysfsfp = fopen(filename, "r");
> if (!sysfsfp) {
> ret = -errno;
> - printf("failed to open %s\n", filename);
> + fprintf(stderr, "failed to open %s\n",
> + filename);
> free(filename);
> goto error_cleanup_array;
> }
> @@ -568,7 +573,7 @@ int find_type_by_name(const char *name, const char *type)
>
> dp = opendir(iio_dir);
> if (!dp) {
> - printf("No industrialio devices available\n");
> + fprintf(stderr, "No industrialio devices available\n");
> return -ENODEV;
> }
>
> @@ -581,11 +586,13 @@ int find_type_by_name(const char *name, const char *type)
> ret = sscanf(ent->d_name + strlen(type), "%d", &number);
> if (ret < 0) {
> ret = -errno;
> - printf("failed to read element number\n");
> + fprintf(stderr,
> + "failed to read element number\n");
> goto error_close_dir;
> } else if (ret != 1) {
> ret = -EIO;
> - printf("failed to match element number\n");
> + fprintf(stderr,
> + "failed to match element number\n");
> goto error_close_dir;
> }
>
> @@ -664,7 +671,7 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
> sysfsfp = fopen(temp, "w");
> if (!sysfsfp) {
> ret = -errno;
> - printf("failed to open %s\n", temp);
> + fprintf(stderr, "failed to open %s\n", temp);
> goto error_free;
> }
>
> @@ -685,7 +692,7 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
> sysfsfp = fopen(temp, "r");
> if (!sysfsfp) {
> ret = -errno;
> - printf("failed to open %s\n", temp);
> + fprintf(stderr, "failed to open %s\n", temp);
> goto error_free;
> }
>
> @@ -703,8 +710,9 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
> }
>
> if (test != val) {
> - printf("Possible failure in int write %d to %s/%s\n",
> - val, basedir, filename);
> + fprintf(stderr,
> + "Possible failure in int write %d to %s/%s\n",
> + val, basedir, filename);
> ret = -1;
> }
> }
> @@ -750,7 +758,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
> char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
>
> if (!temp) {
> - printf("Memory allocation failed\n");
> + fprintf(stderr, "Memory allocation failed\n");
> return -ENOMEM;
> }
>
> @@ -761,7 +769,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
> sysfsfp = fopen(temp, "w");
> if (!sysfsfp) {
> ret = -errno;
> - printf("Could not open %s\n", temp);
> + fprintf(stderr, "Could not open %s\n", temp);
> goto error_free;
> }
>
> @@ -782,7 +790,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
> sysfsfp = fopen(temp, "r");
> if (!sysfsfp) {
> ret = -errno;
> - printf("Could not open file to verify\n");
> + fprintf(stderr, "Could not open file to verify\n");
> goto error_free;
> }
>
> @@ -800,9 +808,10 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
> }
>
> if (strcmp(temp, val) != 0) {
> - printf("Possible failure in string write of %s "
> - "Should be %s written to %s/%s\n", temp, val,
> - basedir, filename);
> + fprintf(stderr,
> + "Possible failure in string write of %s "
> + "Should be %s written to %s/%s\n", temp, val,
> + basedir, filename);
> ret = -1;
> }
> }
> @@ -856,7 +865,7 @@ int read_sysfs_posint(const char *filename, const char *basedir)
> char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
>
> if (!temp) {
> - printf("Memory allocation failed");
> + fprintf(stderr, "Memory allocation failed");
> return -ENOMEM;
> }
>
> @@ -903,7 +912,7 @@ int read_sysfs_float(const char *filename, const char *basedir, float *val)
> char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
>
> if (!temp) {
> - printf("Memory allocation failed");
> + fprintf(stderr, "Memory allocation failed");
> return -ENOMEM;
> }
>
> @@ -950,7 +959,7 @@ int read_sysfs_string(const char *filename, const char *basedir, char *str)
> char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
>
> if (!temp) {
> - printf("Memory allocation failed");
> + fprintf(stderr, "Memory allocation failed");
> return -ENOMEM;
> }
>
> diff --git a/tools/iio/lsiio.c b/tools/iio/lsiio.c
> index 4f8172f..b271a9a 100644
> --- a/tools/iio/lsiio.c
> +++ b/tools/iio/lsiio.c
> @@ -108,7 +108,7 @@ static int dump_devices(void)
>
> dp = opendir(iio_dir);
> if (!dp) {
> - printf("No industrial I/O devices available\n");
> + fprintf(stderr, "No industrial I/O devices available\n");
> return -ENODEV;
> }
>
>
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